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/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @run main UdpSocket
* @summary Basic test for a Socket to a UDP socket
*/
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
import java.util.Arrays;
public class UdpSocket {
static final String MESSAGE = "hello";
public static void main(String[] args) throws IOException {
try (DatagramChannel dc = DatagramChannel.open()) {
var loopback = InetAddress.getLoopbackAddress();
dc.bind(new InetSocketAddress(loopback, 0));
int port = ((InetSocketAddress) dc.getLocalAddress()).getPort();
try (Socket s = new Socket(loopback, port, false)) {
// send datagram with socket output stream
byte[] array1 = MESSAGE.getBytes("UTF-8");
s.getOutputStream().write(array1);
// receive the datagram
var buf = ByteBuffer.allocate(100);
SocketAddress remote = dc.receive(buf);
buf.flip();
if (buf.remaining() != MESSAGE.length())
throw new RuntimeException("Unexpected size");
// echo the datagram
dc.send(buf, remote);
// receive datagram with the socket input stream
byte[] array2 = new byte[100];
int n = s.getInputStream().read(array2);
if (n != MESSAGE.length())
throw new RuntimeException("Unexpected size");
if (!Arrays.equals(array1, 0, n, array2, 0, n))
throw new RuntimeException("Unexpected contents");
}
}
}
}
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